var data=[
            {
                src:'https://www.jq22.com/demo/jquerylbt202008171135/img/t1.png',
                des:'这是第一张'
            },
            {
                src:'https://www.jq22.com/demo/jquerylbt202008171135/img/t2.png',
                des:'这是第二张'
            },
            {
                src:'https://www.jq22.com/demo/jquerylbt202008171135/img/t3.png',
                des:'这是第三张'
            },
            {
                src:'https://www.jq22.com/demo/jquerylbt202008171135/img/t4.png',
                des:'这是第四张'
            }
        ]